Cutting and grinding machine.



No. 845,687. PATENTED FEB. 26, 1907.

P. H. BROWN. CUTTING AND GRINDING MACHINE.

APPLICATION rnlm) NOV. 1. 1905.

3 SHEETS-SHEET 1.

PATBNTED FEB. 26, 1907.

s SHEETS-SHEET 2.

fra /775* W5 ADV Q/QZWEZZ F. H. BROWN.

CUTTING AND GRINDING MACHINE. Anucwlwmmm N011. 1905.

No. 845,687. PATENTED FEB. 26, 1907.

' F. H. BROWN.

CUTTING AND GRINDING MAGHINE. Arrmoflron FILED NOV. 1, 1005.

a SHEETS-SHEET s.

FREDRICK H. BROWN, OF LEBANON, NEW HAMPSHIRE.

CU I'TING AND GRINDING MACHINE.

Specification of Letters Patent.

Patented 'Feb.2e,1eo7.

Application fil d November 1,1905. Serial Nb. 285,396.

To all whom, it may concern:

Be it known that I, FREDRICK H. BROWN, of Lebanon, in the county ofGrafton and State of New Ham shire? have invented certain new and usefuImprovements in Cutting and Grinding Machines, of which the foilow ingis a specification.

My invention relates-to apparatus for cutting and grinding variousobjects, and more particularly to a machine for, operating upon theedges of lenses described in the patent to Frank A. Morgan and myself,No. 670,500, of March 26, 1901. Its principal objects are to simplifyand generally improve such apparatus. y

In the accompanying drawings. in which similar characters designate likeparts throughout the several views, Figure 1 is a top plan view of oneembodiment of m invention. lsig. 2 is a vertical section t -erethroughon the line 2 2 oftig. 1. lig. 3' is" a similar view on the line 3 3 off ig. 1, and 'l ig. 4 is an enlarged detaiL-in end elevation, of thediamond-holding arm.

The numeral designates a base upon which is mounteda casing 11 for agrinding wheel 12, the driving-shaft 13 of which may be journaledinthe-casing and in astandard 14, situated at one side thereof. Thewidth of the casing is such that some lateral movement of thegrinding-wheel in it is permitted. At the end of the driving-shaftopposite the standard is shown a pulley 14 by means of .which'rotationmay be imparted to the shaft and wheel from some suitable source of poper.

I 1 Near the front of the base are a pair of lugs 15 15, perforatedtoreceive and furnish bearings for ashaft 16. Sw ingingupon this shafttow ard' and from the-wheel is a carrier 17, provided w ith separatedarms, one having an index-dial 18, and in which arms are rotatably andlongitudinally movable spindles 19 19 for lenscla'm s or work-holders 2O20. The mounting 0 these spindles is fully set forth in the patent abovereferred to. 1. ixed upon each spindle outside its arm is a gear 21,meshing with a larger gear 22, fast upon the end of the shaft 16. Justinside the gear 22 which is nearest the standard 14 is secured aworm-wheel 23, having cooperating with it a worm 24, fixed to a shaft25. This rounding the shaft 13 and bearing at its inner end about acylindrical extension 28 from the casing. The sleeve is splitlongitudinally at one side, and upon opposite sides of the' openings arelugs 29, threaded to rece1ve a clamping-screw 30, which has at its upper1 end an operating-crank 31. This 0 amp serves to fix the position ofthe sleeve upon the extension, allowing the worm to be swung into gearwith its wheel to impart a longitudinal feeding movement to theworkholder or thrown out. Secured upon the feeding-shaft, adjacent tothesleeve, is a spiral gear 32, meshing w ith a similar gear 33,situated in a chamber in the end of the sleeve and splined upon theshaft 13, so that it is compelled to rotate therw ith, while permittingthe shaft to move longitudinally through it. The gear 33 is retained within the sleeve.- chamber by a screw-cap 33 threaded into the outer endof the sleeve. Depending from the sleeve between the arm and thewheelcasing is shown a securing-arm 34, having an opening 35, containinga contact surface, which may be furnished by a transverse pin 36. Withthis pin may contact one of a series of teeth 37, formed in the edge ofa bar 38, which has at its outer extremity afingerpiece 39. To theopposite end of the bar is attached a spring 40, which at its'forw ardextreme engages the downturned end 43 of a controlling-rod43,-whiclrpasses through a perforated lug 4'4" on the carrier andextends rearw ardly above the spring through an opening 44 in the arm34. In this opening is a pin or contact-face 45 for coaction with ashoulder or projection 46, by means of which the'controlling member maybe fixed in its extreme forvs ard position against the tension of thespring. The rear end of the controlling-rod, as illustrated, is upturnedat 47 and carries a finger-piece 48, by which the rod may be depressedto free the projection from its engagement.

When the worm 24 is not in mesh with its Wheel, the shaft 16 may bemanually rotated by means of a handle 49, projecting from the side ofone of the gears 22. The movement of the carrier toward and from thewheel under the influence of the spring may be limited by a stop-screw50, contacting with a projection 51, rising from the base.

The hand-feed is particularly used in cutting the edges of lenses, andfor this purpose an arm 52 is mounted to swing at the outer side of thecarrier between conical-pointed 'screws 53, threaded through lugs 54upon the carrier. The arm 52 has at its free end mine its position.

- correct position. This abutment by its con-' wall of the bore, and theholder may be retained in a position within the guide member by aprojection 58, extending through a slot 59 in the guide and movable intoan angularportion thereof. At the end of the guide portion opposite thediamond-holder is shown an enlargement 61, having an opening in whichoperates a screw 62, controlling the movement of a contact member 63,which may have adjacent to it a scale 64 to deter- This contact membercooperates with the edge of, a pattern-disk 65, fixed upon theholder-spindle opposite the index 18, and when the spindle is rotatedand the contact member pressed against the disk it causes the diamond toinscribe upon the lens the outline of the disk. The patterndisk may alsocontact with an abutment 66, carried by a stem 67, adjustable through asleeve 68, fixed in a standard 69, supported upon the base. The outerface of this abutment presents the same curvature as the periphery ofthe wheel and may be adjusted with relation thereto by turning afingerpiece 70 to shift the spindle within the sleeve, a scale andindex-point 71 indicating' the tact with the pattern-disk when thecarrier is drawn inwardly by the spring causes the edge of the lens tobe uniformly presented to the grinding-surface of the wheel throughoutits rotary movement, this rotation being effected by the automatic feed.

The end of the shaft 13 is shown as extending but a short distance intothe bearing a in the standard 14 and may there be provided with a ballor antifriction member'72 for contact with the adjacent end of a head orsliding member 72. In this head is an opening 73, movable in alinementwith a slot 74' in a standard-bearing to receive a spring 75, which maybe fixed at its lower en to the standard. The opposite end of thedriving-shaft may have a second ball or antifriction member 76 forcontact with the inner face of a cam-disk 77, fixed at the center of aWheel 78, journaled upon a standard 78 Over this Wheel and a-relativelysmall wheel 79, which may be furnished by a hub upon the end of theroljacent gear 22, passes a belt 80, by which the cam-wheel is rotatedfrom the feed-shaft 16. The tension of the spring is communicated to thedriving-shaft through the head, forcing the opposite extremity of theshaft against the disk and causing this member to reciprocate the shaftacross the work-holder, the extent of this reciprocation preferablybeing substantially equal to the width of the grindingface.

,of the projection therewith, this The general operation of this machineis similar -to that described in the patent; but it may be said that thelens is fixed between the holder members adjacent to the index, with theposition of its axis determined thereby. At this time the clamping-screw30 is loosened, freeing the engagement of the sleeve with the casingextension and allowing the spring 40 to exert its tension, (this beingadjusted to the proper degree by the engagement of one or another of theteeth 37 with the contact-pin,) to raise the arm 26, throwing out theautomatic ieed and at the same time through the controlling-rod swingingthe carrier outward, The arm 52 is now raised and the diamond allowed tocontact with the lens under the influence of the spring 57. Then uponapplying the handfeed the lens may be rotated to-' cause the springdraws the carrier inwardly, so thatthe pattern-disk may contact with theabutment. The automatic feed now rotates the ilens so that its edge isground by contact with the wheel. It should be noted that in addition tothis function of raising the arm and drawing up the carrier the springalso acts upon the controlling-rod to raise it into coaction with itscontact-face to insure en agement eing secured'by the attachment of thespring to the angular end of the controlling-rod. Attention may befurther called to the fact that the reciprocation of the wheel acrossthe edge of the lens to revent scoring instead of a movement of t elens-holder simplifies the structure and obviates" the necessity ofemploying a flexible transmittingshaft or the like.

Having explained-the nature of my invention, I claim 1.A-grinding-machine comprising alongitudinally-movable shaft, agrinding-wheel carried thereby, a camfor moving the shaft, a holdercooperating with the wheel, means for rotating the holder, and means foroperating the cam from the holder-rotating means.

2. A grinding-machine comprising a longitudinally-movable shaft, agrinding-wheel carried by said shaft, a cam-wheel cooperating with theshaft near one extremity, a head contacting With the opposite end of theshaft and being movable independently I thereof, a spring exertingits-tension upon the head to force it against the shaft, and a holdercooperating with the grinding-wheel.

3. The combination with a driving-shaft, of a member for operating uponthe work, a movable work-holder, a bodily-movable intermediate, shaft,gearing connecting said in .termediate shaft with. the driving-shaft andholder, and means for simultaneously moving the workholder andintermediate shaft, the latter eflecting a change in the relation to thegearing.

4. The combination with a driving-shaft, of a member for operating uponthe work, a movable work-holder, a bodily-movable intermediate shaft,gearing connecting said in.-

termediate shaft with the driving-shaft and bolder, and a springoperating to simultanework, a movable work-holder, a swinging member, ashaft journaled in said member, gearing connecting said shaft with thedriving-shaft and holder, and a spring exertin its tension upon theswinging member an holder.

7. The combination with a driving-shaft, of a member for operating uponthe work, a movable work-holder, a swinging member, a shaft journaled insaid member, gearin connecting said shaft with the driving sha t andholder, and a spring exerting its tension upon the swinging member andholder, and means for varying-the point of attachment of the 8. Thecombination with the drivingshaft, of a member for operating upon thework, a movable work-holder, a swinging member, a shaft journaled insaid member, gearing connecting said shaft with the driving-shaft andholder, a controlling member for the holder, and a spring exerting itstension upon the controlling member and holder.

9. The combination with a driving-shaft, of a member for operating uponthe work, a movable work-holder, a sleeve which may turn about thedriving-shaft, an arm projectinglfrom the sleeve, a shaft journaled inthe arm, gearing connecting the arm-shaft with the driving-shaft andholder, and means for fixing the position of the sleeve about thedriving-shaft.

10. The combination with a driving-shaft, of a member for operating uponthe work, a movable'work-holder, a sleeve which may turn about thedriving-shaft, an arm projecting from the sleeve, a shaft journaled inthe arm, gearing c'onnectin the'arm-shaft with the driving-shaft andholder, a spring operating toboth turn the sleeve and move the holder,and means for fixing the position of the sleeve about the driving-shaft.

11. The combination with a driving-shaft, of a member for operating uponthe work, a movable work-holder, a sleeve which may turn about thedriving-shaft, an arm pro- ,jecting, from the sleeve, a shaft journaledin the arm,-- gearing connecting the arm-shaft with the driving-shaftand holder, a controlling member for the holder, and a spring connectingthe controlling member and sleeve.

In testimony whereof I have affixed my signature in presence of twowitnesses.

FREDRICK H. BROWN. Witnesses:

I. N. PULEY,

HENRY M. DAY.

